IBM PowerVM is a hypervisor that the POWER platform supports.
PowerVM admins can see benefits in their environments by making use of OpenStack.
The nova driver (along with a Neutron ML2 compatible agent and ceilometer
agent) will provide capability for admins of PowerVM to use OpenStack natively.
The PowerVM drivers are opensource and currently being worked in the StackForge
community.
For Nova, the PowerVM compute driver is on the openstack base incubation track.
For Neutron the driver will follow the BYOD model set forth in the Neutron extension
decomposition. There is a blueprint for supporting a PowerVM compute
inspector in Ceilometer at least for the L release.
In a later release it’s been expressed that the Ceilometer compute notifications model may change.
For PowerVM systems this ML2 agent would replace the default openvswitch agent for compute nodes
with the PowerVM SEA ML2 agent.

This new change proposed will enable deployment and configuration of the
PowerVM Nova compute driver, Neutron ML2 agent and Ceilometer compute inspector.
Similar to VMWare, this is an addition to support another type of hypervisor.